Buried for millions of years, this Megalodon tooth finally surfaced during an epic underwater fossil hunt.

We are researchers in AI literacy and STEM education who helped create a series of lessons that use fossil shark teeth to demonstrate the power and pitfalls of AI.

Turns out, the palm-sized tooth belonged to an animal that died at least 3.5 million years ago: an Otodus megalodon shark. "She told me she was wading in knee-deep water when she saw it and dove ...